I have tried for several days now on both the website and app to manage my apps and add-ons but keep getting this error message.
As a valued customer, your concerns are always our top priority. We're sorry to hear that you've encountered an error message while processing your request and that this has been happening for several days from our website and from the mobile app. Let's work together to get this resolved. Have you tried rebooting your device? Have there been any recent changes to it? (e.g., software update, new apps downloaded, recent SIM Card change, etc.,) - RobertC_VZW